Eibenstock EBM 182/3 Originalbetriebsanleitung Seite 24

Vertical drilling
Switch the PRCD on.
Open the water supply.
Turn the motor on without touching the surface with the drill bit.
Turn the handle to lower the drill bit until it touches the surface.
In order to reach an exact centring of the drill bit, keep the feed low for
the first centimeter of depth of cut.
Then you can drill faster. A drilling speed which is too low reduces the
power. On the other hand, when the drilling speed is too high, the
diamond segments quickly become blunt.
Drill bit extension
When you need to drill deeper than the usable length of your drill bit is:
First, only drill to the point the usable length of the bit reaches.
Remove the bit and pull the centre core out of the hole without moving
the core drilling unit.
Push the drill bit back into the bore hole.
Screw an adequate extension between drill bit and motor. If the collet of the
drill bit is 1 ¼" , please do not forget the copper rings which make the removal
of the drill bit easier.
Overload Protection
In order to protect the operator, motor and drill bit, the EBM 182/3 is equipped
with a mechanical, electronic and thermal overload protection.
Mechanical: If the drill bit is suddenly blocked in the hole, a clutch will slip
disengaging the drill spindle from the motor.
Electronic: To warn the user against overstressing the tool by applying to
high feed force, a LED is mounted on the motor cap. It does
not light during no-load run or at normal load. In case of over-
load, the LED lights red. Now the tool must be discharged. In
case of longer non-observation of the red indication, the
electronics will independently cut the unit off. After discharge
and switching the tool off and on again, you can continue
working.
Thermal: In case of permanent overload, a thermocouple protects the
motor against destruction. Here also, the user is warned by the
overload indicator. Shortly before the maximum temperature is
reached, the indicator flashes red.
In that case, the tool switches off and can only be restarted
after a certain cooling-down period (approx. 2 minutes). The
overload indicator flashes until the machine has cooled
sufficiently and can be used again. The cooling-down time
depends on the temperature of the motor winding and ambient
temperature.
Drilling
24